No. The problem wasn't the amount of traffic. The problem was the delay from the lights. It was enough to build up long queues on three of the six entry roads. It turns out when you don't unnecessarily impede drivers, they don't become "traffic".

A housing allotment (~100 single family homes) was built about a mile down one of the feeder roads. An elementary school was torn down on another road, but a high school and rec center were built on the old site. The number of vehicles passing through that intersection has only increased.

Maxinum throughput of a round about is much higher than a typical stoplight.

Now, if stoplights typically went to flashing red instead of solid red, so drivers could proceed if traffic was clear, they would approach the efficiency of a roundabout.